Re-enable dx support
This is a partial revert of commits:
858657366fa6 Remove support of disabling Jack.
3ae78612522e Remove javac support in host dex rules.
22313f2b2a4a Remove rules for building dex with dx
Test: builds
Change-Id: Ie12d743cbe978bdeb030910848b67f5945a4fec8
diff --git a/core/combo/javac.mk b/core/combo/javac.mk
index 9042d83..7f66ea8 100644
--- a/core/combo/javac.mk
+++ b/core/combo/javac.mk
@@ -9,6 +9,11 @@
# COMMON_JAVAC -- Java compiler command with common arguments
#
+ifndef ANDROID_COMPILE_WITH_JACK
+# Defines if compilation with jack is enabled by default.
+ANDROID_COMPILE_WITH_JACK := true
+endif
+
common_jdk_flags := -Xmaxerrs 9999999
# Use the indexer wrapper to index the codebase instead of the javac compiler